1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMarch 3, 20151UL 2903Outline of Investigation for Solar Tracker Power and Control CableIssue Number: 1MARCH 3, 2015Summary of TopicsThis is the first issue of the Outline of Investigation for Sol
2、ar TrackerPower and Control Cable, UL 2903.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARCH 3, 2015UL 29032No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
3、DISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .44 References .4CONSTRUCTION5 Assembly 56 Conductors .56.1 General .56.2 Coated copper conductor 56.3 Uncoated copper conductors .56.4 Strands .57 Insulation 58 Overall Jacket 6TEST PROGRAM9 Pe
4、rformance and Test Requirements 69.1 Physical properties .69.2 Copper corrosion .69.3 Cold bend .79.4 Horizontal flame test FT2, required .89.5 Vertical flame test FT1, optional 89.6 VW-1 flame test, optional 89.7 Dielectric strength test 89.8 Insulation resistance 99.9 Durability of ink printing 10
5、9.10 Crushing test 109.11 Capacitance and relative permittivity 119.12 Long-term insulation resistance in water 119.13 Weather resistance .149.14 Swelling and blistering of thermoset jackets .149.15 Heat-shock resistance 159.16 Deformation TPE and thermoplastic only 17MANUFACTURING AND PRODUCTION LI
6、NE TESTS10 Spark Test .17MARKINGS11 Surface Markings .1812 Package Markings 18MARCH 3, 2015 UL 2903 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This Outline covers multiple-conductor, jacketed cables intended for us
7、e as solar tracker power andcontrol cable. Wires and cables are rated 60, 75, 90, or 105C (140, 167, 194, or 221F), 300 V. Thecables are suitable for installation in dry and wet locations where directly buried and exposed to sunlight.2 Components2.1 Except as indicated in 2.2, a component of a produ
8、ct covered by this outline shall comply with therequirements for that component.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this outline, orb) Is supersede
9、d by a requirement in this outline.2.3 A component shall be used in accordance with the rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limit
10、ed conditions, such as certain temperatures notexceeding specified limits and shall be used only under those specific conditions.3 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.4 References4.1 Any undate
11、d reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.4.2 Wherever the designation UL 1581 is used in this standard, reference is to be made to thedesignated parts of the Reference Standard for
12、Electrical Wires, Cables, and Flexible Cords, UL 1581.Whenever the designation UL 2556 is used in this standard, reference it to be made to the designatedparts of the Standard for Wire and Cable Test Methods, UL 2556.MARCH 3, 2015UL 29034UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTIO
13、N ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONSTRUCTION5 Assembly5.1 The cable shall consist of a multiple-conductor cable, where the insulated conductors are cabled orlaid together under an overall nonintegral jacket. The cable may contain any number of coverings, fillers,binders, and/or shields un
14、der the jacket.6 Conductors6.1 General6.1.1 The conductors shall be annealed copper, solid or stranded, bare, or tin-coated. The conductorsshall be a minimum 24 AWG (0.205 mm2).6.2 Coated copper conductor6.2.1 Each tin-coated conductor shall comply with the requirements of the Standard Specification
15、 forTin-Coated Soft or Annealed Copper Wire for Electrical Purposes, ASTM B33.6.2.2 A tin coating is appropriate for use on individual wires (strands) or selected wires, such as the outerlayer of wires of a stranded conductor. The tin coating shall comply with 6.2.1.6.3 Uncoated copper conductors6.3
16、.1 Each wire in an uncoated copper conductor shall comply with the requirements of .StandardSpecification for Soft or Annealed Copper Wire, ASTM B3.6.4 Strands6.4.1 Copper strands smaller than 36 AWG (0.0127 mm2) shall not be used.7 Insulation7.1 The insulation shall be thermoplastic or thermoset. T
17、he insulation thickness is not specified.MARCH 3, 2015 UL 2903 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8 Overall Jacket8.1 The overall jacket shall be thermoplastic or thermoset.8.2 The jacket thickness is not specified, but in no cas
18、e shall be less than 30 mils (0.76 mm) minimumaverage, 24 mils (0.61 mm) minimum at any point.8.3 The jacket shall have a minimum unaged tensile strength of 1200 psi (8.3 MPa) and a minimumunaged elongation of 100 percent as specified in the applicable table in Specific Materials in UL 1581.TEST PRO
19、GRAM9 Performance and Test Requirements9.1 Physical properties9.1.1 Insulation9.1.1.1 The physical properties of the various classes of insulation when tested before and afteraccelerated aging, shall comply with the applicable requirements shown in the tables in Specific Materialsin UL 1581. Complia
20、nce shall be determined in accordance with the test, Physical Properties (ultimateelongation and tensile strength), in UL 2556.9.1.2 Jackets9.1.2.1 The physical properties of the various classes of jackets when tested before and after acceleratedaging, shall comply with the applicable requirements s
21、hown in the tables in Specific Materials in UL 1581.In no case shall the jacket have a tensile strength of less than 1200 psi (8.3 MPa) or an elongation of lessthan 100 percent. Compliance shall be determined in accordance with the test, Physical Properties(ultimate elongation and tensile strength),
22、 in UL 2556 conducted on die-cut samples.9.2 Copper corrosion9.2.1 A bare (uncoated) copper insulated conductor shall show no evidence of corrosion when tested inaccordance with the test, Copper Corrosion, in UL 2556, and when performed at the temperature and forthe duration indicated for the materi
23、al in 9.1.1.1.MARCH 3, 2015UL 29036UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.3 Cold bend9.3.1 The insulation and jacket shall show no cracks when a specimen of the finished cable is conditionedat the temperature specified in Table 9.1
24、for 4 hours and, while still at the specified temperature, woundthe required number of turns around the mandrel having a diameter as specified in Table 9.2. Complianceshall be determined in accordance with the test, Cold Bend, in UL 2556.Table 9.1Temperature for cold bend testType of cable Test temp
25、eratureAny cable marked minus 40C (minus 40F) minus 40C (minus 40F)Any cable marked minus 50C (minus 58F) minus 50C (minus 58F)Any cable marked minus 60C (minus 76F) minus 60C (minus 76F)Any cable marked minus 70C (minus 94F) minus 70C (minus 94F)Any cable not marked with a temperature rating minus
26、20C (minus 4F)Table 9.2Mandrel diameter for cold bend testMinor diameter of flat cable or overall diameter of roundfinished cable, inches (mm)Diameter of mandrel, inches (mm) Number of turnsaround mandrel*0.376 0.500 (9.53 12.70) 1.00 (25.4) 60.501 0.625 (12.71 15.88) 1.25 (31.8) 60.626 0.750 (15.89
27、 19.05) 1.50 (38.0) 10.751 0.874 (19.06 22.22) 1.75 (44.5) 10.875 1.00 (22.23 25.40) 2.00 (50.8) 11.01 1.13 (25.41 28.58) 2.25 (57.1) 11.14 1.25 (28.59 31.75) 2.50 (63.5) 11.26 1.38 (31.76 34.92) 2.75 (69.9) 11.39 1.50 (34.93 38.10) 3.00 (76.2) 11.51 1.63 (38.11 41.28) 3.25 (82.6) 11.64 1.75 (41.29
28、44.45) 3.50 (88.9) 11.76 1.88 (44.46 47.62) 3.75 (95.2) 11.89 2.00 (47.63 50.8) 4.00 (101.6) 1Larger than 2.00 (50.8) 2 X cable diameter 1*The specimen shall be wound six close turns around the mandrel.MARCH 3, 2015 UL 2903 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUT
29、ION WITHOUT PERMISSION FROM UL9.4 Horizontal flame test FT2, required9.4.1 The length of the charred portion of the specimen of the finished cable shall not exceed 3.9 inches(100 mm), nor shall flaming particles ignite cotton. Compliance shall be determined when tested inaccordance with the test, FT
30、2/FH/Horizontal Flame, in UL 2556. In parallel constructions, the majordiameter shall be in the vertical plane for testing.9.5 Vertical flame test FT1, optional9.5.1 Finished cables shall not convey flame, continue to burn for more than 60 seconds after five 15second applications of a standard test
31、flame. Compliance shall be determined in accordance with the testFT1 in UL 2556. A specimen shall be considered to have conveyed flame if more than 25 percent of theextended portion of the indicator is burned. In parallel construction, the major diameter shall face theburner.9.6 VW-1 flame test, opt
32、ional9.6.1 Finished cables shall not convey flame, continue to burn for more than 60 seconds after five 15second applications of a standard test flame. Compliance shall be determined in accordance with the test,FV-2/VW-1, in UL 2556. A specimen shall be considered to have conveyed flame if more than
33、 25 percentof the extended portion of the indicator is burned. In parallel construction, the major diameter shall facethe burner.9.7 Dielectric strength test9.7.1 The finished individual insulated conductors of a multi-conductor cable shall be capable ofwithstanding for 1 minute, without breakdown,
34、the application of an alternating (rms) voltage as indicatedin Table 9.3 between each insulated conductor and water in accordance with the test DielectricVoltage-Withstand Method 1 in UL 2556.Table 9.3Dielectric strength test voltage on finished typesSize of circuit conductor, AWG (mm2) Test voltage
35、, V AC14 AWG (2.08) and smaller 200012 10 (3.31 5.26) 30008 2 (8.37 33.6) 40001 4/0 (44.2 107) 5000250 500 (127 253) 6000550 1000 (279 507) 7000MARCH 3, 2015UL 29038UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.8 Insulation resistance9.8.1
36、 Before assembly into a finished cable, individual insulated conductors shall be capable of exhibitingan insulation resistance of not less than calculated in accordance with 9.8.2, when a specimen of at least50 ft (15 m) is tested in water at 15C (59F) immediately following the dielectric strength t
37、est describedin 9.7.9.8.2 If tested at temperatures different than 15C (59F), the values shall be corrected to 15C.Where:IRT= Insulation resistance in Gm at any temperature TCK15= Constant for the insulation material at 15C in GmFor EP and XL, K15= 3050 GmFor CP and CPE, K15= 305 GmFor SBR, IIR, NR,
38、 and Silicone, K15= 610 GmFor TPE, K15= 610 GmTCF = Temperature correction factor coefficient for 1C for the material (see Annex E in UL 2556)D = Diameter over the insulation (any units)d = Diameter under the insulation (units identical to D)orIRT= Insulation resistance in M1000 ft at any temperatur
39、e TCK15= Constant for the insulation material at 15C in M1000 ftFor EP and XL, K15= 10,000 M1000 ftFor CP, and CPE, K15= 1,000 M1000 ftFor SBR, IIR, NR, and Silicone, K15= 2,000 M1000 ftFor TPE, K15= 2000 M1000 ftTCF = Temperature correction factor coefficient for 1C for the material (see Annex E in
40、 UL 2556)MARCH 3, 2015 UL 2903 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULD = Diameter over the insulation (any units)d = Diameter under the insulation (units identical to D)9.9 Durability of ink printing9.9.1 Surface-printed legends sha
41、ll be complete and legible after two samples have been tested inaccordance with the test, Durability of ink printing, in UL 2556. One sample shall be conditioned at the dryrated temperature of the sample for 24 hours.9.10 Crushing test9.10.1 Finished cable shall withstand:a) Without rupture of the o
42、verall jacket;b) Without rupture of the insulation on any circuit conductor or insulated grounding conductor;andc) Without rupture of any individual jacket on an insulated conductor, 1000 lbf or 4448 N or 454kgf applied for 60 seconds by a flat horizontal steel plate that crushes the cable at the po
43、int atwhich the cable is laid over a steel rod.The test shall be conducted and the results evaluated as described in 9.10.2 9.10.6.9.10.2 The results of this test for a given construction are to be taken as representative of theperformance of all other cables of the same construction containing eith
44、er more conductors of the samesize or the same or a larger number of conductors of a larger size. The performance of the cabledconductors in a round cable is to be considered representative of the performance of those conductors inboth round and flat cables.9.10.3 The cable is to be crushed between
45、a flat, horizontal steel plate and a solid steel rod by theapplication of dead weight or in a compression machine whose jaws close at the rate of 0.50 0.05 in/min(10 1 mm/min). Each plate is to be 2 inches (50 mm) wide. A solid steel rod 3/4 inch (19 mm) in diameterand of a length equal to at least
46、6 inches (150 mm) is to be bolted or otherwise secured to the upper faceof the lower plate. The longitudinal axes of the plates and the rod are to be in the same vertical plane.The specimens, the apparatus, and the surrounding air are to be in thermal equilibrium with one anotherat a temperature of
47、24.0 8.0C (75.2 14.4F) throughout the test.9.10.4 The cable is to be tested in a continuous length of at least 36 inches (915 mm) with the cable beingcrushed at three points along that length. The points at which the cable is to be crushed are to bemeasured and marked with chalk or another innocuous
48、 means on the test length before the test is begun.The first mark is to be placed 9 inches (230 mm) from one end of the test length and the two remainingmarks are to be made at succeeding intervals of 9 inches (230 mm) down the length of the cable.9.10.5 The cable at the first mark is to be placed a
49、nd held on the steel rod with the longitudinal axis ofthe cable horizontal, perpendicular to the longitudinal axis of the rod, and in the vertical plane that laterallybisects the upper and lower plates and the rod. The upper steel plate is to be made snug against thecable. In a test using a dead weight or weights, weight exerting the force specified in 9.10.1(c) is to beplaced gently on the upper plate. In a test using a compression ma
